By Nature Smell Posted in: Animals
Dolphins and whales, for example? It doesn’t make sense.
Air-breathing sea creatures evolved from ancestors that walked on land and had lungs. And those ancestors evolved long ago from sea creatures that had gills.
They are mammals they require air to breathe.
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Air-breathing sea creatures evolved from ancestors that walked on land and had lungs. And those ancestors evolved long ago from sea creatures that had gills.
They are mammals they require air to breathe.